Corbus CBO buys 13,500 shares in open market

Corbus Pharmaceuticals Chief Business Officer Nishant C. Saxena bought 13,500 shares of common stock in open-market transactions.

Accepted by SEC EDGAR 06/03/2026 - 05:36 PM EDT Learn about SEC filing dates

Rhea-AI Filing Summary

Corbus Pharmaceuticals Chief Business Officer Nishant C. Saxena bought 13,500 shares of common stock in open-market transactions. He purchased 9,000 shares at $7.58 per share on June 3 and 4,500 shares at a weighted average price of $7.33 per share on June 2, in multiple trades between $7.33 and $7.34. Following these purchases, he directly holds 75,300 common shares, including 58,300 unvested RSUs that remain subject to the grant’s vesting schedule.

Insider Trade Summary

Net Buyer: 13,500 shares

Net Buy 2 txns

Insider Saxena Nishant C

Role Chief Business Officer

Bought 13,500 shs ($101K)

Increase in Position 21.8%

Type	Security	Shares	Price	Value
Purchase	Common Stock, par value $0.0001 per share	9,000	$7.58	$68K
Purchase	Common Stock, par value $0.0001 per share	4,500	$7.333	$33K

Holdings After Transaction: Common Stock, par value $0.0001 per share — 75,300 shares (Direct)

Holdings Before and After: Common Stock, par value $0.0001 per share, 61,800 to 75,300 shares (Direct)

Footnotes (2)

1. F1. The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.33 to $7.34. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.
2. F2. This amount includes 58,300 unvested RSUs subject to the grant's vesting schedule as previously reported.

Key Figures

Total shares purchased: 13,500 shares June 3 purchase: 9,000 shares at $7.58/share June 2 weighted average price: $7.33/share +2 more

5 metrics

Total shares purchased 13,500 shares Open-market buys on June 2–3, 2026

June 3 purchase 9,000 shares at $7.58/share Common stock open-market purchase

June 2 weighted average price $7.33/share 4,500 shares bought in multiple trades $7.33–$7.34

Shares owned after transaction 75,300 shares Direct common stock holdings after June 3, 2026

Unvested RSUs 58,300 RSUs Remain subject to vesting schedule

Key Terms

open-market purchase, weighted average price, RSUs, vesting schedule

4 terms

open-market purchase financial

"Transaction code P is described as an open-market purchase of common stock."

An open-market purchase is when an investor or a company buys shares on a public stock exchange at the going market price, rather than through a private deal. It matters to investors because these purchases change how many shares are available, can push the stock price up or signal confidence from large buyers, and often affect per-share metrics like earnings—think of it like someone buying lots of apples off a grocery shelf, reducing supply and potentially raising the price.

weighted average price financial

"The price reported is a weighted average price for trades between $7.33 and $7.34."

Weighted average price is the average price of a security where each trade or component is counted according to its size, so bigger trades pull the average more than smaller ones. Think of it like calculating the average cost of a grocery haul where items you bought more of have greater influence on the final per-item cost. Investors use it to understand the true average price paid or received, judge execution quality, and compare trading performance against market movement.

RSUs financial

"This amount includes 58,300 unvested RSUs subject to the grant's vesting schedule."

RSUs, or restricted stock units, are a form of company shares given to employees as part of their compensation. They are typically awarded with certain restrictions, such as a waiting period before they can be fully owned or sold, similar to earning a gift that becomes fully yours over time. For investors, RSUs can impact a company's stock offerings and reflect how much the company relies on stock-based incentives to attract and retain talent.

vesting schedule financial

"The 58,300 unvested RSUs remain subject to the grant's vesting schedule as previously reported."

A vesting schedule is a timeline that determines when someone gains full ownership of certain benefits, such as company stock or retirement contributions. Think of it like earning the right to own a gift gradually over time, rather than receiving it all at once. It matters to investors because it affects when they can fully access or sell these benefits, influencing their financial planning and decision-making.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transaction did Corbus (CRBP) report for Nishant C. Saxena?

Corbus (CRBP) reported that Chief Business Officer Nishant C. Saxena purchased 13,500 shares of common stock in open-market transactions. These buys occurred on June 2 and June 3, 2026, and increased his direct ownership stake in the company.

How many Corbus (CRBP) shares did Nishant C. Saxena buy and at what prices?

Nishant C. Saxena bought 9,000 Corbus (CRBP) shares at $7.58 each on June 3, 2026, and 4,500 shares at a weighted average price of $7.33 on June 2, 2026, through multiple trades between $7.33 and $7.34.

What is Nishant C. Saxena’s total Corbus (CRBP) share ownership after these trades?

After these trades, Nishant C. Saxena directly holds 75,300 Corbus (CRBP) common shares. This figure reflects his updated direct ownership position immediately following the June 3, 2026 open-market purchase transaction disclosed in the filing.

How many unvested RSUs does Nishant C. Saxena hold in Corbus (CRBP)?

Nishant C. Saxena holds 58,300 unvested RSUs of Corbus (CRBP), which remain subject to the grant’s vesting schedule. These RSUs represent additional potential shares that will only fully transfer as they vest over time.

Were Nishant C. Saxena’s Corbus (CRBP) purchases made in the open market?

Yes, both transactions were coded as open-market purchases of Corbus (CRBP) common stock. The filing classifies them as non-derivative transactions with transaction code P, indicating purchases in the open market or a private transaction.

What does weighted average price mean in Nishant C. Saxena’s Corbus (CRBP) Form 4?

The weighted average price of $7.33 reflects multiple trades executed between $7.33 and $7.34 for Corbus (CRBP) shares. The insider notes that detailed trade-by-trade pricing information is available to the issuer, security holders, or SEC staff upon request.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Saxena Nishant C

(Last) (First) (Middle)

C/O CORBUS PHARMACEUTICALS HOLDINGS, INC

500 RIVER RIDGE DRIVE

(Street)

NORWOOD MASSACHUSETTS 02062

(City) (State) (Zip)

UNITED STATES

(Country)

2. Issuer Name and Ticker or Trading Symbol
Corbus Pharmaceuticals Holdings, Inc. [ CRBP ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
X	Officer (give title below)		Other (specify below)
	Chief Business Officer

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/02/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, par value $0.0001 per share	06/02/2026		P		4,500	A	$7.333(1)	66,300(2)	D
Common Stock, par value $0.0001 per share	06/03/2026		P		9,000	A	$7.58	75,300(2)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. The price reported in column 4 is a weighted average price. These shares were purchased in multiple transactions at prices ranging from $7.33 to $7.34. The Reporting Person undertakes to provide to the Issuer, any security holder of the Issuer or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the range set forth in this footnote.

2. This amount includes 58,300 unvested RSUs subject to the grant's vesting schedule as previously reported.

	/s/Meghan Houghton, Attorney-in-Fact for Nishant Saxena	06/03/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.
* Form 4: SEC 1474 (03-26)